Our Form 8938 vs. FBAR overview covers the basics: different law, different agency, different threshold. This article goes a level deeper, into the specific situations where the two regimes genuinely diverge in ways that catch even experienced filers off guard.
Signature authority: the cleanest split
This is the divergence people trip over most. The FBAR reaches accounts over which you have signature or other authority, even with no ownership stake — think a treasurer who can sign on a foreign company's bank account. Form 8938 generally does not: it's about assets you have a financial interest in. So an employee with signing power over an employer's overseas account may owe an FBAR while owing no Form 8938 at all. The reverse mistake — assuming an 8938 covers a signature-authority account — is just as common.
Directly held foreign securities
Another sharp point of divergence. If you hold foreign stock certificates directly — not through a custodial brokerage account, but registered in your own name — the FBAR generally doesn't apply, because there's no "account." Form 8938, by contrast, explicitly reaches directly-held foreign stock and securities as a category of specified foreign financial asset, regardless of whether they sit in an account. This is uncommon for most individual investors today but still surfaces with inherited or historically-issued foreign shares.
Foreign pensions and deferred compensation
Foreign pensions are usually reportable on both forms, but the mechanics differ and the valuation is genuinely hard. The FBAR wants the account reported like any other financial account. Form 8938 has its own conventions and, crucially, ties into the income side of your return — and treaty provisions can affect how the underlying growth is taxed even when the interest itself must still be disclosed on both forms. If you hold a foreign workplace pension, this is one of the areas most worth a professional review; we cover it in depth in Foreign Pensions and Form 8938.
Jointly-owned assets and married couples
The joint-ownership rules don't line up. The FBAR has specific mechanics that sometimes let married couples file a single report covering jointly-owned accounts. Form 8938 has its own separate threshold structure for married couples filing jointly ($100,000 / $150,000 domestic, $400,000 / $600,000 abroad) — which is not simply double the FBAR's flat $10,000, and doesn't track the FBAR's joint-filing rules. A couple can be over one threshold and under the other. Married-filing-separately adds another layer, with its own counting rules for jointly-held assets.
Accounts owned through an entity
If a foreign account is owned by a corporation, partnership, or trust you control, the FBAR generally requires you, as the majority owner, to report it as your own financial interest. Form 8938 has differently-structured rules about when the foreign entity interest itself — as opposed to the entity's underlying accounts — becomes separately reportable. And since 2016, certain domestic entities can independently owe Form 8938 as specified domestic entities, a business-side obligation with no direct FBAR analog for the entity in the same way.
Thresholds and residency
The FBAR's $10,000 threshold is flat and residency-blind. Form 8938's thresholds are far higher and jump dramatically for taxpayers living abroad. The practical result: an American overseas with, say, $150,000 in foreign accounts is comfortably over the FBAR line but may be well under Form 8938's $200,000 overseas single threshold — so they file one and not the other. See Reporting Thresholds.
A practical way to think about the overlap
| If you have… | FBAR? | Form 8938? |
|---|---|---|
| A $120,000 foreign brokerage account (single, in the U.S.) | Yes | Yes |
| Foreign stock certificates held directly, $80,000, no account | No | Possibly, if over threshold |
| Signature authority on an employer's foreign account, no ownership | Yes | Generally no |
| $150,000 in foreign accounts while living abroad (single) | Yes | Likely no (under $200,000) |
| A jointly-held account with your spouse, filing jointly | Possibly one joint FBAR | Separate joint thresholds apply |
Where this article stops being general education
Every scenario above has fact-specific exceptions this article can't fully capture. If more than one applies to you at once — say, a jointly-owned entity account with a foreign pension component — that's a strong signal to get a professional review rather than piece the answer together from general guides, including this one.